Horn.] 



OPHRYASTINI. 33 



Apex of hind tibiae narrow, disc of thorax coarsely 

 punctured. 



Rostrum with three sulci, elytra oblong argentatus. 



Rostrum with median sulcus only, elytra 



broadly oval lucanus. 



Apex of hind tibiae truncate with broad oval 

 space. 



Thorax rather finely punctured deser tus. 



Elytral striae fine, punctures coarse, thorax very 



coarsely and deeply punctured varius. 



Elytral striae fine, punctures fine. 



Intervals unequal, elytra vittate geminatus. 



Intervals equal, elytra uncolorous plumbeus. 



In the species belonging to the first group the median sulcus of the ros- 

 trum extends on the front. In the second group the sulcus is rostral and 

 extends to the transverse impression only. 



E. speciosus Lee. (Ophryastes) Proc. Acad. vi, p. 444. 



Form oblong, vertex flat. Rostrum without transverse basal impression, . 

 trisulcate, median sulcus extending from the tip to the front, terminating 

 in a small fovea, lateral sulci on the sides of the rostrum, deep and angula- 

 ted; surface sparsely punctured, densely scaly with white, middle and sides 

 plumbeous. Thorax broader than long, sides rather strongly arcuate, 

 apex and base with deeply impressed line at the sides, median line finely 

 impressed ; surface rather finely punctured, even, covered with dark 

 plumbeous scales ; on each side of middle an irregular white vitta. Elytra 

 oblong oval, finely striate, stria? serrately punctured, intervals flat, unequal, 

 surface densely covered with dark plumbeous scales, the narrower intervals 

 and sides white. Body beneath and legs white. Length .74 inch ; 19 mm. 



One of the most conspicuous Rhynchophora in our fauna. The tenth 

 elytral stria is composed of a few punctures close to the margin. The 

 cotyloid cavities of the hind tibiae are feebly cavernous and scaly. 



Occurs in north-western Texas. 



E. decipiens Lee. ( Ophryastes} Proc. Acad. vi, p. 445. 



Form oblong. Vertex not more convex. Rostrum without basal im- 

 pression, median sulcus replaced by an obsolete fovea, lateral sulci very 

 short ; surface sparsely punctured, densely covered with whitish scales. 

 Thorax not broader than long, sides strongly arcuate, apex and base trun- 

 cate, surface deeply perforato-punctate, not uneven. Elytra oblong oval, 

 finely striate, stria? with rather distant punctures, intervals equal, flat, sur- 

 face densely covered with dark cinereous scales. Body beneath and legs 

 white. Length .28-. 44 inch ; 7-11 mm. 



Posterior cotyloid cavities strongly cavernous. This species may be 

 easily known by the sculpture of the rostrum. 



Occurs in Texas, New Mexico and Arizona. 



PROC. AMER. PHILOS. SOC. XV. 96. E 



